Surface-treatment apparatus



FIG. 1 is a left front perspective view of a surface-treatment apparatus;

FIG. 2 is a front elevational view of the surface-treatment apparatus of FIG. 1;

FIG. 3 is a rear elevational view of the surface-treatment apparatus of FIG. 1;

FIG. 4 is a right end elevational view of the surface-treatment apparatus of FIG. 1;

FIG. 5 is a left end elevational view of the surface-treatment apparatus of FIG. 1;

FIG. 6 is a top plan view of the surface-treatment apparatus of FIG. 1;

FIG. 7 is a bottom plan view of the surface-treatment apparatus of FIG. 1; and,

FIG. 8 is a right rear perspective view of the surface-treatment apparatus of FIG. 1.

The details shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a surface-treatment apparatus, as shown and described. 